Electric switch.



ELECTMC SWITCH. APPLICATION FlLIED MAR. 21| 1914.

1,155,68L 'Pnta 00t.12,1915. n' l Figi.

@NH l t Henry G Frehcl'uy narran santas Parana onirica.-

HENRY Gr. FRNCH, OF SCHENECTADY, NEW YORK, ASSIGNOR T() GENERAL ELCTRIG COMPANY, A CORPORATION OF NEW YORK.

ELECTRIC SWITCH.

iaseesi.

`Sapeccation of Letters Patent.

Patented Get. i2, 1915.

T nl( whom 'it may concern Be -it known that l, HENRY G. FimiICH, a citizen of the United States, residing at Schenectady, in the county of Schenectady,

`State of New York, have invented. certain new and useful improvements in Electric Switches, of which the following isa speciiication. v

My present invention relates to electric switches and more particularly to means for holding aswitch of the knife blade type firmly locked in its closedposition.

ln many cases, especially in high tension line disconnecting switches it is found desirable to support a switch in such a way that it opens downward. With afconstruction lof this nature although the contact clips may be designed so as to exert considerable pressure upon the switch blade it frequently happens that after continued use the prese sure exerted by the clips becomes insulicient to hold the switch closed. Also, if the switch is subject to vibration the switch may be gradually opened by the action of gravity. By use of my invention these disadvantages are entirely obviatcd and the switch is held closed under all conditions, irrespective of the way in which it is mounted, until it is desired that it be opened. rlhe construction which I employ also enables lthe switch to -be opened by a simple operation of withdrawing Athe blade from the contact clips without any necessity for first releasing any complicated mechanism.

My invention will best be understoodby reference to the accompanying drawing forming a part of this specification in which;

Figure l shows a switch of the high tension, outdoor, disconnecting type' adapted for suspensionon the transmission line and equipped according'to one form of my invention, and Figs. 2 and 3 are enlarged plan shaped member 9, the vertical branch of 55 which is provided with a Y-shaped slot 10 to serve as a guide for the switch blade; this slot being placed in aiinemeiit with the contactclips 8 which receive the switch blade. This member is comparatively rigid which are substantially parallel with the sides of the slot. These spring members are also provided with curved shoulders 12 in order that theymay normallytouch each other near the point where the slot becomes wider, either when the switch is open orl when the blade is received between them. The spring members are pivotally mounted by bending one end around the studs 13.

The opposite ends are free to slide on the studs 14 when the members are separated 75 pole hook (not shown) and terminals 16 80 are provided for attaching the line conductors to the switch.

`With this construction it will be evidentV that when the switch is closed it will be firmly held in that position, the spring members l1 coming together and surrounding the blade, and that if thesespring members are made suiiiciently strong there` will be no possibility ofthe switch opening by reason of vibration or shock of any kind.

By exerting a strong steady pull on the hook 15 however, the switch may be opened when desired without difficulty or may be closed as readily.

I do not desire to restrict myself to the What I claim as new and desire to secure -by Letters Patent of the United States, is

1. In an electric switch, the combination of a switchblade and spring locking mem-. bers surrounding said blade, each of said locking members having one end pivotally switch blade, contact clips, a member having a Y-sliaped slot in alinement with said clips and spring members on each side of the slot to hold the blade in its closed position.

8. Locking means fora knife blade switch comprising spring members adapted to surround tlie blade of said switch, each of said spring members having one end pivotally. mounted and the other end free to slide over' a ixed stud.

4. In combination in an electric switch, a switch blade, a memberl having a V-shaped slot for guiding and receiving said blade and spring members carried bv said-guide member and adapted to surround the blade.

5. In an electric svitch, the combination of. a switch blade, a member having a Y- shaped slot for guiding and receiving said blade. and spring members pivotally mounted on each side of said slotand adapted to hold the blade in place when the switch is closed.

(l. ln an electric switch, the combination of a switch blade, a member having a Y- sliaped slot to guide and receive said blade, and spring members mounted on each side of said slot and normally touching each Copies of this patent may 'be obtained for other at the point where the slot'begins tov Widen.

7. 1n an electric switch the 'combination of a blade, contact clips, a guidingrmember having a Y-shaped slot in alinement with said clips, studs on each branch of said guiding member near the ends thereof., spring locking members having one of their ends pivoted on each side of said slot near its base and their other ends free to slide on said studs.

8. In a disconnecting switch the Combination of' a pivotally mounted switch blade, contact clips for receiving said blade, said contact clips being insulated from the mounting of said blade and movable with respect thereto, a guide member having a Y-shaped slot in alinement with said clips and spring members 0n each side of the slot to hold the blade in closed position.

1n Witness whereof, l have hereunto set my hand this 20th vday of March 191i.

BENJAMIYN B. HULL, HELEN ORFORD.

five cents each, by addressing the Commissioner of Entente,

Washington, D. C. 

